Advertising sign



FIG. 1 is a perspective view of an advertising sign in accordance with our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line showing further details of the advertising sign are for illustrative purposes only and form no part of the claimed design. 

An ornamental design for an advertising sign, as shown and described. 